I have built up my LR4 with many of the same mods you are working on. I would highly recommend the Rover Specialties rock sliders. These sliders are great because the go under the vehicle about a foot and thus protect the very important pump for the air suspension. With these sliders, a full set of skid plates, and bigger tires on 18" wheels, my LR4 did great in Moab earlier this year, tackling the trifecta of PSM/GS/GBR. The skids and underbody protection were essential as they got pretty beaten up.
Did you consider the Devon 4x4 hidden winch mount? That is what i went with and have been really impressed. It keeps the look clean and simple. You dont lose any angles up front. And i believe it is what was on the Millionth Disco journey.
I look forward to seeing the progress of this build.